Engine Compression ratio

 

An engine has a clearnce volume of 100 cm3 and swept volume of 800 cm3.

Here,

Clearance volume,

Vc= 100 cm3

Swept volume, Vs= 800 cm3

We know,

Compression ratio, Vc+Vs/Vc

= 100+800/100

=900/100

=9

Therefore, Compression ratio is 9:1